TL;DR: If someone tries to draw extra cards, they either end up discarding and drawing, or milling instead, so they never actually go up on cards
Like most Pokmon cards, the value of Mewtwo-EX depends on a few consistent factors: its rarity, the printing and finish (regular or foil), its physical condition, and the set it was printed in (XY Black Star Promos)
he did get a lot of cool rares
However you do it, make sure you can interact with this powerful zone
The irony is that there Magic has no shortage of good blue and black creatures
Oko, the Ringleader is a centerpiece of the sets story and marketing, and its only fitting that the leader of the gang gets both excellent mechanical design and a wanted poster treatment to really show off his style